LeetCode SQL: Find the Second Highest Salary Using DENSE_RANK and sub-query Explained Step-by-Step

Welcome back, friends! 👋 In this video, we’ll tackle one of the most popular SQL interview-style problems on LeetCode: finding the second highest salary from the Employee table. Instead of just writing the query, I’ll walk you through the logic step by step: Why we use DENSE_RANK() instead of ROW_NUMBER() How ranking functions handle duplicate salaries Writing a clean query that works in real-world scenarios Common mistakes beginners make and how to avoid them By the end of this video, you’ll not only understand the solution but also gain confidence in using SQL window functions for interview questions and practical projects. What you’ll learn: SQL Window Functions (DENSE_RANK, ROW_NUMBER, RANK) Query structuring for clarity and efficiency How to explain your solution in interviews This problem is a classic example of how LeetCode prepares you for real-world data challenges. If you’re preparing for placements, coding interviews, or just want to sharpen your SQL skills, this video is for you! Don’t forget to like, share, and subscribe for more SQL + Data Science content. Drop your questions in the comments. I’d love to help you out. #problemsolving #leetcode #leetcodecoding #leetcodeinsql